Process of making borax.



ATENT- i FFICE.

Join: L. NOVARIINE, on NEW YORK, N. Y.

PROCESS ogFjfimAKuyc B'ORAX.

SPECIFICATION forming part of Letters Patent No. 654,667, dated July 31, 1900.

V Appllcatloh filed September'2'h 1899; Serial No. 731,881. (No specimens.)

1O ess of making bora'x in its various forms from any of the natural borate ores or artificial borates by subjecting the crushed and powdered ore or borate to the action of a solution of sodium sulfid, separating the'borax generated in this operation by crystallizing, and purifying it b repeated recrystallizations; and the inve tion consists of the process of making borax in any of its known forms by subjecting the natural ore or artificial borate in an open or closed vessel under ordinary conditions or under pressure in pres: ence ofan excess of hydrosulfuric-acid gas, or sulfurous-acid gas or carbonic-acid gas, or in presence of air to the action of a boiling solution of sodium sulfid in water, decanting ofi the clear solution or filtering, then allowing the borax to crystallize out.

In carrying out my improved process the natural or artificial borate is'either subjected to the action of a mixture of natural or artificial sodium sulfate and charcoal, coal, coke, or any carbonaceous material at a high temperature, the resulting mass being further boiled with water or merely lixiviated and the borax thus extracted being allowed to crys tallize out of the filtered or clarified solution,

or the said borates are treated, after or without having previously been heated, with a solution of pure or crude sodium sulfid such 46*{as can be obtained by subjecting natural or artificial sodium sulfate to the action of a reducing age11t-such as charcoal, coal, or any other carbonaceous material at a high temperature-and then crystallizin g outthe borax from the filtered or clarified solution thus ob- I tained.

The following formulas and equation illustrate the reaction which takes place in the process above referred to:

OaB O +Na S+10H Q: Calcium sodium water. pyroborate. sulfid. v

. CaS|-'Na B;O,.1OI I O.

calcium sodium biborate sulfid. or borax.

The proportions used correspondto about two or three times the theoretical proportion of sodium sulfid.

borax from t e ore, as it does not require any intermediar other than sodium sulfate and as the yield/is well nigh theoretical.

Having thus described my invention, I claimas rrhw and desire to secure by Letters Patent- 1. The process herein described of manu facturing sodium borates, consisting of the following steps: first, reducing crude sodium sulfates at a high temperature, by means of a carbonaceous material, treatingthe resulting mixture of sodium compounds with water, subjecting a natural borate to the action of the solution thus obtained, then filtering or decanting it oif and isolating the sodium borates therein contained through repeated crystallizations, substantially as set forth. 2. The process herein described of manufacturing'borax and other sodium borates,

of the most yexpensive methods of making sulfid obtained by any known method, then tion and isolating theborax therein contained through repeated crystallizations, substantially as set forth.

3. The process herein described of mann factoring borax and other sodium borates which consists in subjecting natural borates to the action of an aqueous solution of sodium compounds containing sodium sulfid, filtering The main advantage of my improved proc ess of manufacturing borax is that it is one which consists in subjecting natural borates q to the action of an aqueous solution of sodium;

filtering or decanting 01f the resulting soluor decanting off the resulting solution; then lyn, New 'Yo 'k, this 20th day-of September, isolating the borax therein contained by re- 1899.

peatd crystallizations substantially as set I forth, I JOHN L. NQYARINE.

5 In testimony that I claim the foregoing as Witnesses: v

my invention Ihave signed myname, in pres- RICHARD A. FOSTER,

ence of two subscribing witnesses, at Brook} CHAS. BOREL 

